In Eastern North America, and particularly well known in the Southwest, are abundant archeological evidences from easily recognized prehistoric living sites. These reveal a succession of more recent cultures and changes within cultures, as well as movement of early peoples. In contrast there are relatively few recognized prehistoric sites in California which tell much about early customs and material culture of aboriginal man. Some productive areas which have been found are notably the following: The Farmington Reservoir area of Stanislaus County more than 4,000 years old—possibly much older, Kingsley Cave, the Santa Barbara area, and the off-shore islands to the southwest of it. There are also a few shell mounds in the Los Angeles—Ventura area and more numerous and extensive ones in the San Francisco Bay vicinity. Of the latter shell mounds A. L. Kroeber writes:

AREAS AND SUBAREAS OF CULTURES IN AND ABOUT CALIFORNIA
after A. L. Kroeber

NORTHWESTERN CALIF. NORTH PACIFIC COAST AREA CENTRAL CALIFORNIA SOUTHERN CALIFORNIA PLATEAU AREA PLAINS AREA CALIFORNIA-GREAT BASIN AREA SOUTHWEST AREA LOWER COLORADO

“... all the classes of objects (shells, refuse, mortars, pestles, obsidian, charmstones, and bone awls) in question occur at the bottom, middle, and top of the mounds, and ... they occur with substantially the same frequency. In other words, the natives of the San Francisco region traded the same materials from the same localities one, two, or three thousand years ago as when they were discovered at the end of the eighteenth century. They ate the same food, in nearly the same proportions (only mammalian bones became more abundant in higher levels), prepared it in substantially the same manner, and sewed skins, rush mats, and coiled baskets similarly to their recent descendants. Even their religion was conservative, since the identical charms seem to have been regarded potent. In a word, the basis of culture remained identical during the whole of the shell-mound period.

“When it is remembered that ... the beginning of this period (occurred) more than 3,000 years ago, it is clear that we are here confronted by a historical fact of extraordinary importance. It means that at the time when Troy was besieged and Solomon was building the temple, at a period when even Greek civilization had not yet taken on the traits that we regard as characteristic, when only a few scattering foundations of specific modern culture were being laid and our own northern ancestors dwelled in unmitigated barbarism, the native Californian already lived in all essentials like his descendant of today. In Europe and Asia, change succeeded change of the profoundest type. On this far shore of the Pacific, civilization, such as it was, remained immutable in all fundamentals.

“... The permanence of Californian culture ... is of far more than local interest. It is a fact of significance in the history of civilization.”

Successive intrusions of different peoples and the isolation of the resultant developing Indian tribes, century after century, gave rise to many diverse languages. Although some were mere dialects, there were about 750 different North American Indian languages.

Chapter III
THE CALIFORNIA INDIANS

Dr. A. L. Kroeber’s map shows all tribes within the present political boundaries of the State of California. The tribes of the extreme northwest corner and those of the southern tip of the state are not typical of what we generally think of as “California Indians”.

Although it may not be scientifically sound to do so, it is often convenient to refer to the Indian tribes of the California region collectively. The term “Digger Indians” is frequently used for this purpose with a somewhat disparaging connotation. The origin of this name is traceable to white traders and pioneers who observed that local Indians dug extensively for a number of food items, hence the name Digger was applied. However, this is a poor name as digging was but one of many methods the Indians used to secure food. Besides, digging was by no means peculiar to Indians of the California area. It is best, therefore, simply to use the term California Indians, if one wishes to refer to this group of tribes as a whole.

In connection with the nickname Digger Indian, it is of interest to note that the California tribes used the conspicuous pine of the foothills, Pinus sabiniana, as a source of edible pine nuts and for other purposes too. Because the so called Digger Indians used these trees so much, the pioneers named the conifers Digger Pines, a name recognized today as the proper common name of that tree.